P.S.: Yesterday HadCRUT4 just reported their surface anomaly for February: the 9th-warmest February in 165 years. Some haitus. Even their 15-yr trend is 0.05 ± 0.02 C/decade, and rising fast as the 1997-98 El Nino falls out the back-end of the 15-yr interval, and it's for suckers.

8 comments:

There is no doubt that global temperatures have risen since 1850. It was very smart of the IPCC to pick a start date that served their political agenda.

In recent years Hansen made "Adjustments" to the GISS records to maintain his meme of the "Hottest Year On Record". Fortunately, some of us have the unadjusted GISS v2 temperature records which say otherwise.

As the period in question (1988 to 2013) lies entirely within the satellite record there is a sanity check available:http://www.drroyspencer.com/2012/09/uah-global-temperature-update-for-august-2012-0-34-deg-c/

UAH says no statistically significant warming since 1998. Are they liars too?

Besides, Peter, even if the UAH LT data showed zero trend for 15 years, there are plenty of reasons why the signal of AGW would not rise above the noise in the climate system over such a relatively short period, and forcings such as aerosols and black carbons that may be causing cooling.

There is also the possibility that the UAH and RSS data have developed a cool bias and are underestimating the actual trend.

"There is also the possibility that the UAH and RSS data have developed a cool bias and are underestimating the actual trend."

That is indeed a possibility.

In contrast it is a certainty that the recent retrospective NASA GISS adjustments (2008 vs. 2012) have a warming bias. Something that prompted Richard Lindzen to note in February 2012:"We may not be able to predict the future, but in climate ‘science,’ we also can’t predict the past."